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miv72 [106K]
3 years ago
5

Does anyone know how to solve this?

Mathematics
1 answer:
Margarita [4]3 years ago
4 0

Answer:

The correct option is c.

Step-by-step explanation:

Given that,

u = 7i+4j and v = 2i-3j

We need to find the product of u and v. The dot product of two vectors is given by :

u{\cdot}v=(7i+4j){\cdot} (2i-3j)\\\\=(7i)(2i)+(4j)(-3j)\\\\=14-12\\\\=2

So, the dot product of u and v is equal to 2.

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A grocer sells 30 loaves of bread a day. The cost is $2.50 per loaf. The grocer estimates that for each $0.50 increase in cost,
Viktor [21]

Answer:

none of the above

Step-by-step explanation:

The grocer's revenue will be the product of the number of loaves sold (30-2x) and their price (2.50+0.50x).

Revenue will be positive for values of x between those that make these factors be zero. The number of loaves sold will be zero when ...

... 30 -2x = 0

... 15 -x = 0 . . . . . divide by 2

... x = 15 . . . . . . . add x

The price of each loaf will be zero when ...

... 2.50 +0.50x = 0

... 5 + x = 0 . . . . . . . multiply by 2

... x = -5 . . . . . . . . . . subtract 5

Revenue will be positive for any number of increases greater than -5 and less than 15.

_____

D is the best of the offered choices, but it is incorrect in detail. -5 is a number less than 15, but will give zero revenue.

4 0
4 years ago
Is this right? Please help asap​
Nadusha1986 [10]

Answer:

yes

Step-by-step explanation:

3 0
4 years ago
Read 2 more answers
Pls answer for my sister If Johnny had 12 blueberries and ate 10 and then Jena came and gave 20 how much does Johnny have now.
Ganezh [65]

Answer:

He will have 22 blueberries

Step-by-step explanation:

Johnny ate 10 which makes him left with 2 blueberries

Jena then gave him 20.

20 + 2 = 22

5 0
3 years ago
Read 2 more answers
Without evaluating, order
Iteru [2.4K]

The order of the terms from l<u>east to greates</u>t is 5^-7, 5^0 and 5^4

<h3>Exponents and indices</h3>

Exponents are written as power to a number or expression. According to the question we are to arrange the exponents  5^-7, 5^4 and 5^0 from least to the greatest.

The best approach is to check their exponents and arrange them from least to greatest with evaluating each terms

From the given exponents, the arrangement from least to greatest is -7, 0 and 4. Hence we can conclude that the order of the terms from l<u>east to greates</u>t is 5^-7, 5^0 and 5^4

Learn more on exponent ordering here: brainly.com/question/24468862

#SPJ1

8 0
1 year ago
The science club has five female and five male students. The club will randomly select two people to compete in the upcoming sci
vovangra [49]
To determine the probability that both people chosen are females, we will use the rule of multiplication. 
Let event A = the event that the first person chosen is female; and let B = the event that the second person is female. 
To start, it is given that there are 10 students, 5 of them are females.  Therefore, P(A) = 5/10
After the first selection, there are 9 students, 4 of them are females. Therefore, P(A|B) = 4/9
Based on the rule of multiplication:

P(A∩B) = P(A) * P(A|B)
P(A∩B) = (5/10) (4/9)
P(A∩B) = 20/90
P(A∩B) = 2/9

The probability that both people chosen are females is 2/9.
7 0
3 years ago
Read 2 more answers
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